Faz 'ip link' em1 = p4p1?

Question

Estou tentando gerenciar remotamente um servidor Dell com o Ubuntu 14.04. O servidor tem uma placa-mãe de rede Broadcom 5720 QP 1GB de 540 BBW. A Broadcom docs diz que tem dois slots PCIe com duas portas ethernet por peça.

Eu li através destes biosdevname docs e mostra p<slot>p<ethernet port> . ip link mostra p4p1, p4p2, p6p1, & amp; p6p2. Isso faz sentido. O cartão deve estar usando os slots 4 e amp; 6.

O que não faz sentido para mim é ip link também mostra em1, em2, em3, em4. Estes são descritos como interfaces de rede incorporadas. Esses não são aliases para as portas Ethernet PCIe acima? Se eles são aliases, como eu sei qual deles corresponde ao outro? Em outras palavras, em1 corresponde à mesma porta de hardware que p4p1?

cameron@echo:~$ ip link
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: em1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT group default qlen 1000
    link/ether 44:a8:42:2b:4c:39 brd ff:ff:ff:ff:ff:ff
3: em2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT group default qlen 1000
    link/ether 44:a8:42:2b:4c:3a brd ff:ff:ff:ff:ff:ff
4: em3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT group default qlen 1000
    link/ether 44:a8:42:2b:4c:3b brd ff:ff:ff:ff:ff:ff
5: em4: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT group default qlen 1000
    link/ether 44:a8:42:2b:4c:3c brd ff:ff:ff:ff:ff:ff
6: p4p1: <BROADCAST,MULTICAST> mtu 1500 qdisc mq state DOWN mode DEFAULT group default qlen 1000
    link/ether a0:36:9f:12:11:e8 brd ff:ff:ff:ff:ff:ff
7: p4p2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT group default qlen 1000
    link/ether a0:36:9f:12:11:ea brd ff:ff:ff:ff:ff:ff
8: p6p1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT group default qlen 1000
    link/ether 00:07:43:33:51:00 brd ff:ff:ff:ff:ff:ff
9: p6p2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT group default qlen 1000
    link/ether 00:07:43:33:51:08 brd ff:ff:ff:ff:ff:ff
10: lxcbr0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000
    link/ether 1e:c4:f7:44:50:cd brd ff:ff:ff:ff:ff:ff
11: docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN mode DEFAULT group default
    link/ether 02:42:f4:3d:2c:be brd ff:ff:ff:ff:ff:ff

Atualização 1. Aqui está a informação PCI se isso ajudar. Pode ser que eu estava errado sobre o hardware. Seria ótimo saber qual link acima corresponde a qual desses dispositivos PCI.

cameron@echo:~$ lspci -nn | grep Ethernet
01:00.0 Ethernet controller [0200]: Broadcom Corporation NetXtreme BCM5720 Gigabit Ethernet PCIe [14e4:165f]
01:00.1 Ethernet controller [0200]: Broadcom Corporation NetXtreme BCM5720 Gigabit Ethernet PCIe [14e4:165f]
02:00.0 Ethernet controller [0200]: Broadcom Corporation NetXtreme BCM5720 Gigabit Ethernet PCIe [14e4:165f]
02:00.1 Ethernet controller [0200]: Broadcom Corporation NetXtreme BCM5720 Gigabit Ethernet PCIe [14e4:165f]
04:00.0 Ethernet controller [0200]: Chelsio Communications Inc T520-CR Unified Wire Ethernet Controller [1425:5001]
04:00.1 Ethernet controller [0200]: Chelsio Communications Inc T520-CR Unified Wire Ethernet Controller [1425:5001]
04:00.2 Ethernet controller [0200]: Chelsio Communications Inc T520-CR Unified Wire Ethernet Controller [1425:5001]
04:00.3 Ethernet controller [0200]: Chelsio Communications Inc T520-CR Unified Wire Ethernet Controller [1425:5001]
04:00.4 Ethernet controller [0200]: Chelsio Communications Inc T520-CR Unified Wire Ethernet Controller [1425:5401]
82:00.0 Ethernet controller [0200]: Intel Corporation Ethernet Controller 10-Gigabit X540-AT2 [8086:1528] (rev 01)
82:00.1 Ethernet controller [0200]: Intel Corporation Ethernet Controller 10-Gigabit X540-AT2 [8086:1528] (rev 01)

    

Answer 1

A resposta é não, existem três interfaces de rede separadas. De estes documentos , aprendi que sudo lshw -class network pode ser usado para ver qual lógica nomes estão associados a cada endereço pci.

*-network:0
       description: Ethernet interface
       product: NetXtreme BCM5720 Gigabit Ethernet PCIe
       vendor: Broadcom Corporation
       physical id: 0
       bus info: pci@0000:01:00.0
       logical name: em1
       version: 00
       serial: 44:a8:42:2b:4c:39
       size: 1Gbit/s
       capacity: 1Gbit/s
       width: 64 bits
       clock: 33MHz
       capabilities: pm vpd msi msix pciexpress bus_master cap_list rom ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=tg3 driverversion=3.137 duplex=full firmware=FFV7.10.61 bc 5720-v1.36 ip=10.1.14.22 latency=0 link=yes multicast=yes port=twisted pair speed=1Gbit/s
       resources: irq:89 memory:93330000-9333ffff memory:93340000-9334ffff memory:93350000-9335ffff memory:93700000-9373ffff

  *-network:0 DISABLED
       description: Ethernet interface
       product: Ethernet Controller 10-Gigabit X540-AT2
       vendor: Intel Corporation
       physical id: 0
       bus info: pci@0000:82:00.0
       logical name: p4p1
       version: 01
       serial: a0:36:9f:12:11:e8
       capacity: 1Gbit/s
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi msix pciexpress bus_master cap_list rom ethernet physical tp 1000bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=ixgbe driverversion=4.2.1-k firmware=0x80000389 latency=0 link=no multicast=yes port=twisted pair
       resources: irq:90 memory:c8200000-c83fffff memory:c8404000-c8407fff memory:c8600000-c867ffff memory:c8700000-c87fffff memory:c8800000-c88fffff